/Engine/Plugins/2D/Paper2D/Source/Paper2D/Classes/PaperSpriteActor.h
This actor is created when you drag a sprite asset from the content browser into the level, and it is just a thin wrapper around a UPaperSpriteComponent that actually references the asset.
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)(ComponentWrapperClass, Meta=(ChildCanTick)) class PAPER2APaperSpriteActor : public [AActor](API\Runtime\Engine\GameFramework\AActor)